So far I have only used LVN in my RAP with awesome results. Generally getting on average 100 fps faster than using my developed loads for my AR's. Decided to try and do a load workup for my Odin Works DMR 18" using Hornady 129 Interlocks and LVR.
I need to give you a little back history. The first load I ever developed for this 18" was using AR Comp and the 129 ABLR which was my hunting load for several years. They would run about 2350 fps with 26.9 grains of ARComp. I noticed however, in colder temperatures, I would experience short stroking, so I opened up my gas block 1/2 turn and problem was fixed but when using other loads and different powders, it was generally over-gassed. I believe this could have contributed to my problem I am sharing with you today.
I started my 129 Interlock and LVR load at about 29.5 in .3gr increments. Temperature was 70° that day. I was watching for pressure signs and everything seemed to be OK. I never planned to shoot the 31 grain load but I did not see any outstanding signs of pressure so I continued and shot it.
First 31 grain shot was only slightly faster than previous 30.7 but I noticed a double feed. Also my brass was not in the brass catcher.......... I pulled the mag, removed the double feed and discovered the shot round still in the chamber. After cycling a few times I removed the BCG and noticed a broken extractor. I was using a JP bolt.
I guess I must have pushed it a little too hard. LVR is sneaky and its such a slow burning powder, pressure signs can be hard to see. Be Careful with it.
Went ahead and purchased a couple extractors from SixFiveOutfitters and I'm back on the road again!
BTW, thanks BFT for everything you do! Both of these new web sites are awesome!
I will do more testing with the 30.4 grain load.
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I need to give you a little back history. The first load I ever developed for this 18" was using AR Comp and the 129 ABLR which was my hunting load for several years. They would run about 2350 fps with 26.9 grains of ARComp. I noticed however, in colder temperatures, I would experience short stroking, so I opened up my gas block 1/2 turn and problem was fixed but when using other loads and different powders, it was generally over-gassed. I believe this could have contributed to my problem I am sharing with you today.
I started my 129 Interlock and LVR load at about 29.5 in .3gr increments. Temperature was 70° that day. I was watching for pressure signs and everything seemed to be OK. I never planned to shoot the 31 grain load but I did not see any outstanding signs of pressure so I continued and shot it.
First 31 grain shot was only slightly faster than previous 30.7 but I noticed a double feed. Also my brass was not in the brass catcher.......... I pulled the mag, removed the double feed and discovered the shot round still in the chamber. After cycling a few times I removed the BCG and noticed a broken extractor. I was using a JP bolt.
I guess I must have pushed it a little too hard. LVR is sneaky and its such a slow burning powder, pressure signs can be hard to see. Be Careful with it.
Went ahead and purchased a couple extractors from SixFiveOutfitters and I'm back on the road again!
BTW, thanks BFT for everything you do! Both of these new web sites are awesome!
I will do more testing with the 30.4 grain load.
image.png
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